Screenpeek – Paste URL, Create Mockup
from Diigo
10 online tools to help you make quick mockup images of websites on any device | Creative Boom
Smartmockups - Free product mockup generator
Mockerie.io - Mockup your website or app
Mockuper | Free custom mockups generator
Create realistic mockups for your website for FREE
MockUPhone
Magic Mockups • Free real-life mockup generator
Popular Websites - Webflow
Balsamiq. Rapid, effective and fun wireframing software.